Tags: reverse-engineering binary
Rating:
# In Plain Text (Binary RE 50)
We're given an file. Let's look at its type.
```
$ file challenge
challenge: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=63c841da3195b526943ba730cad66392c5dae087, not stripped
```
Looks like it's an executable file, which makes sense since this is in the Binary RE category. Let's see what happens when we run it.
```
$ chmod +x challenge
$ ./challenge
Hey there, I know I am the challenge and all, but I forgot what the flag was...
Could you just tell me the flag real quick? Please?
That doesn't sound familiar... :/
```
One of the first things I do whenever I run into a low-difficulty Binary RE problem like this is to just run `strings` on it. Let's see if the flag is in there somewhere.
```
$ strings challenge | grep "MCA{.*}"
MCA{y3ah_sur3_here_y0u_g0}
```
